To reduce commutation difficulties, the universal motors are designed with:

Universal Motors

Universal motors are a type of electric motor that can operate on both AC and DC supply. They are commonly found in applications requiring high-speed operation, such as vacuum cleaners, drills, and mixers.

Commutation in Universal Motors:

• Commutation refers to the process of switching current direction in the armature windings through brushes and a commutator.
• In a universal motor, high current and strong magnetic fields can lead to sparking at the brushes, causing wear and reducing efficiency.
• A weaker magnetic field helps reduce the rate of change of current in the armature windings, which in turn reduces the commutation difficulties (i.e., sparking and brush wear).